Well, if you don't have enough resources to develop it yourself you might have to get external funding and to make sure your backers don't steal the idea and produce it themselves you patent it. Isn't this how patents are supposed to protect small independent innovators? If it works or not I'm not qualified to answer.

Still, i think that at least some form of prototype must be available or must be demonstrated within a certain timeframe. And the patent in question here is just ridiculous. Wireless displays must exist already?